Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
(OP)
What is the advantage of having a 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V WYE-DELTA motor ? The motor is for deepwell application & mechanical type reduced voltage starter is used in both the cases.





RE: Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
The advantage of 12 leads is important due to the motor could run at two diferent voltages (230 V- 460 V) and could be started in star-delta for both voltages(if the rated connection is delta), if you will use the motor only for 460 V and will be started with a soft-starter or across the line then use a 3 leads motor.
The 12 leads give you more starting options.
Regards
Carlos
RE: Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
They could be using 12 leads to reduced the individual conductor size. This is done because sometimes the cable for a standard 6-lead wye-delta will not fit between the motor/pump and the well casing, or the current demand makes it cost effective. Current and voltage drop are important when sizing the cable, especially since the cable runs can be extremely long (100' is short). We regularly have to upsize cable to get the voltage drop below 5%.
RE: Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
If by "mechanical type" you mean an Autotransformer type starter, then there is no advantage for using a 12 lead motor for a deepwell pump. But 12 leads allows the alternate use of a Part Winding starter, which is popular in that industry, or a Wye-Delta, which is not popular in the US for deepwell pump systems.
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RE: Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
RE: Advantages of 12 lead 460V,60Hz WYE-DELTA Motor over 6 lead 460V motor
Bill
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